Thanks for your response, Alexander. >> In versions prior to 8.13.0, sendmail did not support mail filters by >> default, and must be compiled with filter support enabled by defining > > Wrong! Milter support is compiled in already - since ages in the > Sendmail Red Hat Linux shipped and all Fedora Core release versions. > All you need to successfully compile MimeDefang yourself is the > sendmail-devel package to get the libmilter headers. > Oh, OK. This is good to know. >> As I do not wish to blow up my mail server, I'm asking what would be the >> best plan of attack? Upgrade to the latest Sendmail, if yes, how? From >> tarball? I did not see any updated sendmail RPM's for FC2. Or should I >> install the sendmail-8.12.11-4.6 source and rebuild it with the above >> lines? > > Keep the Sendmail FC2 ships and install MimeDefang. Maybe use the > MimeDefang RPM from Dag Wieers. > Well it's not working--perhaps you can enlighten me. I believe everything is installed correctly (sendmail, mimedefang and spamassassin). This is what I have done--I've added: INPUT_MAIL_FILTER(`mimedefang', `S=unix:/var/spool/MIMEDefang/mimedefang.sock, F=T, T=S:1m;R:1m') to my sendmail.mc file (mimedefang.sock doesn't exist, I don't know if this is an issue or not) then ran: m4 sendmail.mc > sendmail.cf I then issued these commands: #CONFIGURE MIMEDEFANG TO START WITH INIT SCRIPT cd redhat cp mimedefang-sysconfig /etc/sysconfig/mimedefang cp mimedefang-init /etc/rc.d/init.d/mimedefang chkconfig --add mimedefang I then restarted both sendmail and mimedefang services. Everything starts fine, or at least it says it does. I cannot send or recieve e-mail after these modifications (or more specifically, after the sendmail modification.) I did not try to telnet to port 25 after this modification to see if sendmail is still listening, I could try it. So I revert back to my original mc and cf files, restart sendmail, and mail works again. Any ideas as to what I'm missing? Mimedefang is version 2.49 installed from source--which installed without error. Thanks, Julian